Maricopa Agricultural Center, Arizona.
May 21, 1997Precision farming land management

Contributor: Susan Moran, U.S. Department of Agriculture For farmers and land managers, increasing crop yields and cutting costs while reducing environmental pollution is a constant challenge. To accomplish this goal, many farm managers are looking for new technologies to help them decide when and where to irrigate, fertilize, seed crops, and use herbicides. Currently the […]

mosaic of the Imperial Valley
Jun 30, 1992Monitoring irrigation practices

Location: Imperial Valley, California Source: USGS Earthshots The Imperial Valley is actually an extension of the Gulf of California, cut off from the Gulf by the Colorado River’s delta fan. The area south of the border is known as the Mexicali Valley. In these images, several cities are visible within the area of irrigated agriculture […]

Landsat false-color infrared images of Rondônia, Brazil.
Jan 14, 1992Monitoring deforestation

Location: Rondônia, Brazil Source: USGS Earthshots These images show a portion of the state of Rondônia, Brazil, in which tropical deforestation has occurred. The 1975 and 1986 images are MSS data. The 1992 image is TM data. Approximately 30% (3,562,800 sq km) of the world’s tropical forests are in Brazil. The estimated average deforestation rate […]

Sediment densities in the Gulf of Thailand at the mouth of the Chao Phraya River.
Dec 14, 1990Determining patterns and extent of turbidity

Location: Chao Phraya River, Thailand Landsat TM image showing sediment in the Gulf of Thailand at the mouth of the Chao Phraya River. Colors represent different concentrations of sediment. Sediment load in rivers can be affected by land-use practices and rainfall variations. The curving horizontal lines are “trails” of sediment stirred up by trolling fishing […]

Sediment densities in the Gulf of Thailand
Dec 14, 1990Determining patterns and extent of turbidity

Location: Chao Phraya River, Thailand Landsat TM image showing sediment in the Gulf of Thailand at the mouth of the Chao Phraya River. Colors represent different concentrations of sediment. Sediment load in rivers can be affected by land-use practices and rainfall variations. The curving horizontal lines are “trails” of sediment stirred up by trolling fishing […]

Mapping floods and flood plain characteristics
Dec 18, 1987Mapping floods and flood plain characteristics

Location: Great Salt Lake, Utah Source: USGS Earthshots The Great Salt Lake is a terminal lake, with no outlet rivers running to the ocean. This means the lake responds dramatically to changes in inflow. Rainy weather beginning in 1982 brought the lake to its highest levels in recorded history, peaking in June 1986 and March-April […]

Stereo image of Bolivia's Camargo syncline
Jun 16, 1986Cartographic mapping: 3-D Map Stereo Projections

Location: Camargo Syncline, Bolivia Source: RSD Portal This is a perspective view of the Camargo syncline in central Bolivia. It was created from a true stereo pair of images taken one year apart (June 6, 1985 and June 16, 1986) in Landsat TM channels 5,4,2. Landsat imaged the area from slightly different angles. The two […]

Landsat TM image of the Harrisburg region acquired on Oct. 30, 1984.
Oct 30, 1984Mapping major geologic features

Location: Harrisburg, Pennsylvania This Landsat view shows Harrisburg and the Appalachian Mountains of central Pennsylvania. The Piedmont province is visible in the lower right corner. The Great Valley runs SW-NE across the center of view, and the Valley and Ridge province occupies the northwest portion of scene. The city of Harrisburg is the blue-grey patch next […]